Add JaCoCo plugin
Add JaCoCo plugin

Add JaCoCo plugin to generate code coverage reports with all add-ons
`:addOns:jacocoReport` and each e.g. `:addOns:reveal:jacocoTestReport`.
Add task `:addOns:testReport` to generate a test report with the tests
from all add-ons.

Signed-off-by: thc202 <43af82ef30812a20fbcf38b99a6f72cdd3a89ac1@gmail.com>

thc202/zap-extensions,kingthorin/zap-extensions,thc202/zap-extensions,veggiespam/zap-extensions,veggiespam/zap-extensions,zaproxy/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,denniskniep/zap-extensions,secdec/zap-extensions,denniskniep/zap-extensions,zapbot/zap-extensions,psiinon/zap-extensions,denniskniep/zap-extensions,zapbot/zap-extensions,thc202/zap-extensions,veggiespam/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,denniskniep/zap-extensions,zaproxy/zap-extensions,zaproxy/zap-extensions,thc202/zap-extensions,denniskniep/zap-extensions,zaproxy/zap-extensions,psiinon/zap-extensions,kingthorin/zap-extensions,zaproxy/zap-extensions,kingthorin/zap-extensions,psiinon/zap-extensions,denniskniep/zap-extensions,zapbot/zap-extensions,zapbot/zap-extensions,secdec/zap-extensions,secdec/zap-extensions,thc202/zap-extensions,psiinon/zap-extensions,zapbot/zap-extensions,thc202/zap-extensions,secdec/zap-extensions,zapbot/zap-extensions,kingthorin/zap-extensions,kingthorin/zap-extensions,psiinon/zap-extensions,psiinon/zap-extensions,zaproxy/zap-extensions,kingthorin/zap-extensions